Biden warns US troops could be attacked by ISIS at Kabul airport and turns his back when asked about it: Says August 31 deadline could be extended - if Taliban allow it - and expands airport perimeter The president was filmed turning his back and exiting a press conference when asked a serious question about the increased threat to Americans from ISIS after his Afghan withdrawal. Moments before, Biden had said 'thank you' to assembled journalists in an apparent signal that the question and answer session had concluded. But some viewers and commentators felt that the question he ignored was of sufficient gravitas and urgency to merit an answer from the president. The incident came moments after Biden insisted his administration was 'working hard' and as 'fast as we can' to get Americans and U.S. allies out of Afghanistan, noting that 33,000 people have been evacuated from the country since July. Sunday's press conference also saw 78 year-old Biden struggle with the name of FEMA director Deanne Criswell, who he had reportedly spoken to moments before taking the lectern. And the president laughed when asked about a new poll showing that a majority of Americans had lost faith in his ability to govern. .